Drill and work holder



Dec, 12, 1939. N. A. LPEZ DRILL AND woax HOLDERA 3 Sheets-Sheet l Filed Jan. 3, 1939 W L 3 f J7J 5/. l W f. A k. V (T Xin n )v L L D l- .r iwi o L L ||||||lr. y am @L w L w D D j I A153 0 y o f j Dec. 12, 'N. A LPEZ DRILL AND WORK HOLDER Filed Jan. 3, 1959 3 Sheets-Sheet 2 AV //\A Jol Deco 12,/ 1939. N- LPEZ 2,183,295

DRILL AND woRx HOLDER Filed Jan. s, 19:59 3 sheets-sheet s Patented Dec. 12, 1939 PATENT OFFICE DRILL AND WORK HOLDER Nicols A. Lpez, Chicago, 111.

Application January 3,

6 Claims.

The present invention relates to drills, and particularly to means whereby a piece of work may be accurately positioned with respect to the drill and held during the drilling operation. It is the purpose of the present invention to provide an improved drill construction having a work holder that is readily adaptable to holding and supporting pieces of different sizes and shapes in position to be drilled.

The present invention contemplates a work holding device consisting of two plate elements which cooperate with the base of the drill stand to position a piece of work on the base, and, Wherever desirable, to clamp the vwork in position so that it will not shift out of place while it is being drilled. 'I'he invention further contemplates a device of few parts readily adjustable to adapt it to different sizes and shapes of work.

The features and advantages of the present in- 20v vention will appear more fully as the description proceeds, reference being had to the accompanying drawings wherein a, preferred form of the invention is shown. It is to be understood, however, that the drawings and description are illustrative only, and are not to be taken as limit- 25 ing the invention except insofar as it is limited by the claims.

In the drawings, Fig. 1 is a view in side elevation of a drill embodying the present invention;

Fig. 2 is a sectional view taken on the line 2 2 of Fig. 3;

Fig. 3 is a plan view of the drill base and work holding attachment;

Fig. 4 is a fragmentary View in side elevation of the base being shown in section to illustrate a slightly modied form of work holding attachment;

Fig. 5 is a plan View of the base and attach- 40' ment shown in Fig. 4, certain parts being broken away for the sake of clearness, and

Fig. 6 is a sectional view taken on the line 6 9 of Fig. 5.

Referring now to the drawings, the present invention is embodied in a drill which, as shown, comprises a base I and a standard II. The standard II supports a drill frame I2 for Vertical sliding movement. The standard II also includes a vertically adjustable bracket I3 that carries an upright guide I4 to aid in guiding the drill frame I2 vertically with respect to the base I0. The

frame I2 supports a hand drill I5 which is adapted to be moved vertically to bring the drill bit 551 I6 to the work held on the base I Il.

The drill I comprises a chuck I'I, a drill shaft I8 for mounting the chuck, and a sleeve I9 in which the drill shaft I8 is mounted. The sleeve I9 has a handle 20 at the upper end thereof and is mounted on the frame I2 by `means of 1939, Serial No. 249,050

a secondary frame 2| that fits down over the guide I4 and is connected to the top bar I2@ of the frame I2 by a screw 22. By removing the screw 22, the frame 2| can be removed from the guide I4, leaving the drill I5 entirely free of the standard.

The drill I5 includes a pinion 23 on the shaft I8 which meshes with a drive gear 24 that is 'i journalled on a shaft 25 in a block 26 carried by the frame 2i. The shaft 25 is adapted to be rotated by a crank arm 2l having a handle 28 at the outer end thereof.

Referring now to the manner of advancing the drill I5 to the work, it will be noted that a spring 29 is interposed between the frame I2 and the bracket I3 upon the standard II. The bracket I3 has a heavy collar 39 which is threaded to receive a set screw 3I to lock the bracket I3 at any desired level on the standard Ii. The collar 30 is, of course, rigid with bracket I3. The collar Si! is provided with a screw stud 32 which acts-as a pivot for a link 33. .The link`33 is pivoted to an operating lever 34 having a handle 35 at its liree end. The pivotal connection is established by meansof a headed pin 36. The lever 34 has an elongated slot 3'I therein which slot receives a pin 38 mounted on the block 26. The pin 38 is opposite the shaft 25 and is grooved to provide a seat for the lever 34, as will be readily understood.

Normally, the spring 29 will hold the frame I2 which carries the drill I5 in its uppermost position, that is, the limiting position to which the link 33 and the lever 34 will permit the drill I5 to rise. In bringing the drill I5 down to the work, the operator merely presses down on the handle 35, thus forcing the drill I5 and the frame I2 down against the pressure of the spring 29.

In order to position the work properly beneath the drill bit I6, I provide a Work holding device which comprisestwo oppositely disposed plates 40 and 4I. The plate 49 has a down-turned flange 42, and the plate 4I has a similar flange 43. The plates 49 and 4I also have sections 44 and 45 struck up from the center portions thereof and notched in their top edges (see the section44 in Fig. l) to receive work which may be of round cross section or other shape, that will not lie on a flat surface.

The flange 42 has a rod 46 fixed thereto. This rod extends lengthwise to and through the flange 43 and is threaded at its free end. The flange 43 carries a rod 4l which extends to and through the flange 42. The two rods 49 and 4l serve to mount the plates 49 and 4I upon an inverted channel-shaped member 48'which consists of aflat strip of metal having flanges 49 and 59 at its opposite ends. The flanges 49 and 59 are, of course, apertured for the passage of the rods 49 'and'4l.' 'The 'flange 5U is provided with a set screw 5i by which it is possible to clamp the member [2S on tcp of the base i5 of the drill. An adjusting nut 52, which may be of any suitable type such as the knurled nut shown, is adapted to be threaded upon the free end of the rod for drawing the plates 40 and 4I together.

In Figs. 2 and 3 the plates 40 and 4I are shown as holding a block 53 that is about to be drilled by the drill bit i5. The block 53 rests upon the member d8 and may be positioned wherever desired on the block i8 by hand, after which the plates il and i may be brought against the block and tightened against it by turning the screw 52. Once clamped between the plates 40 and 4l, the block 53 cannot, of course, move in a direction pmfallel to the clamping edges of the plates. The plates, however, can be shifted in the direction of the axes oi the rods d6 and i1 or, in other words, along a straight line perpendicular to the clamping edges of the plates. 'Ihe resulting friction between the members lil and the plates 40 and lil, when a block 53 is clamped, together with the pressure on the block 53, will prevent shifting oi the block in the drilling operation. Ii it is desired to drill a round piece, such as a shaft or a pipe, the round piece is set in the notched sections il and 45 and this will prevent its rolling during the drilling operation. There is no particular means provided for preventing endwise shifting of the round pieces.

Referring now to Figs. 4 6, these figures show a modified form of the invention wherein the base l is a hollow casting provided with a groove 54 in the top surface thereof, directly below the Center of the drill chuck Il. This groove 54 serves as a means for receiving round work, such, for example, as the piece of shaft shown at 55. The base i has a peripheral flange 56 which is apertured at the opposite sides of the base, as indicated at 57 and 58, to receive rods 59 and Sil. The rods 59 and 50 are secured to plates 40' and di similar to plates 4] and 4l. That is, the rod 59 is secured to the iange 43' of the plate 4| and passes through the down-turned flange 42' of the plate llt. The rod 60 is secured to the flange 42 and passes through the ange d3'. The free end of the rod 60 is screw threaded to receive a lznurled nut 52. It will readily be understood that the adjacent clamping edges of the plates 1355 and lil can be brought against a piece of work in the manner illustrated in Figs. 4-6 by positioning the work upon the base I0' and tightening the nut 52.

It will be noted that the base i0' has two depending thick lug portions, one at the edge most remote from the standard l! and the other adjacent to the rod 59. These lugs give the necessary strength to the base at the point where the greatest pressure occurs, which is directly beneath the drill line. In addition, these lugs are apertured, as shown, so as to receive a clamping device to aid in attaching the base wherever desired.

From the foregoing description it is believed that the construction and advantages of the present invention will be readily7 apparent to those skilled in this fart. Having thus described my invention, what I claim as new and desire toI secure by Letters Patent is:

1. In a hand drill, a work-holding device, said device comprising in combination a drill stand base, two plates adapted to clamp work between their adjacent edges, said plates having depending flanges at their outer edges, a rod fixed to a ilange of each plate and extending through the corresponding iiange of the other plate, said base having means slidably receiving and guiding said rods, and means on one of said rods for holding the plates against work inserted between them.

2. In a hand drill, a work-holding device, said device comprising in combination a drill stand base, two plates adapted to clamp work between their adjacent edges, said plates having depending iianges at their cuter edges, a rod fixed to a flange of each plate and extending through the corresponding flange of the other plate, said base having means slidably receiving land guiding said rods, and means on one of said rods for holding the plates against work inserted between them, said work-holding device comprising, also, notched supporting means for holding round work with its axis parallel to said plates.

3. In a hand drill, a work-holding device, said device comprising in combination a drill stand base, two plates adapted to clamp work between their adjacent edges, said plates having depending flanges at their outer edges, a rod fixed to a flange of each plate and extending through the corresponding iiange of the other plate, said base having means slidably receiving and guiding said rods, and means on one of said rods for holding the plates against work inserted between them, said werk-holding device comprising, aso, notched `supporting means for holding round work with its axis parallel to said plates, said notched supporting means being in said base below the plates.

4. In a hand drill, a work-holding device, said device comprising in combination a drill stand base, two plates adapted to clamp work between their adjacent edges, said plates having depending iianges at their outer edges, a rod fixed to a ange of each plate and extending through the corresponding flange of the other plate, said base having means slidably receiving and guiding said rods, and means on one of said rods for holding the plates against work inserted between them, said work-holding device comprising, also, notched supporting means for holding round work with its axis parallel to said plates, said notched supporting means being on said plates.

5. In a lian-d drill, a work-holding device, said device comprising in combination a drill stand base, two plates adapted to clamp work between their adjacent edges, said plates having depending iianges at their outer edges, a rod fixed to a flange of each plate and extending through the corresponding iiange of the other plate, said base having means slidably receiving and guiding said rods, and means on one of said rods for holding the plates against work inserted between them, said iirst named means comprising a member apertured tc receive said rods and removably mounted on said base.

6. A work-holding attachment for drills comprising a member having means to secure it to a drill, two plates overlying said member and having depending portions at their outer edges, a rod secured to one plate and extending through said member and the depending portion of the other plate, a second rod secured to Said other plate and extending substantially parallel lto the first named rod through said member and through the depending portion of said rst named plate, and means on one rod for drawing said plates together.

NICOLAS A. LPEZ. 

